Revisions by month for editors who joined FA WP in 2015

This query is marked as a draft This query has been published by Huji.

SQL

use fawiki_p;
select rev.rev_user, left(rev.rev_timestamp, 6) as yearmonth, count(rev.rev_id) as edits
from revision rev join
(
select user_id from
(
select user_id, min(rev_timestamp) as first_edit
from user
join revision
on rev_user = user_id
group by rev_user
) f
where first_edit > '20150101000000'
and first_edit < '20160101000000'
) u2015
on rev.rev_user = u2015.user_id
group by rev.rev_user
order by 1, 2

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